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coresight: tmc-etr: Add function to register catu ops 

Make etr_catu_buf_ops static. Instead of directly accessing it in
etr_buf_ops[], add a function to let catu driver register the ops at
runtime. Break circular dependency between tmc-etr and catu drivers.

Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200928163513.70169-23-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mian Yousaf Kaukab 2020-09-28 10:35:10 -06:00 committed by Greg Kroah-Hartman
parent 3c3fd1a145
commit 66af416d9d
4 changed files with 36 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/hwtracing/coresight/coresight-catu.c
View File

@ -358,7 +358,7 @@ static int catu_alloc_etr_buf(struct tmc_drvdata *tmc_drvdata,
return 0;
}
const struct etr_buf_operations etr_catu_buf_ops = {
static const struct etr_buf_operations etr_catu_buf_ops = {
.alloc = catu_alloc_etr_buf,
.free = catu_free_etr_buf,
.sync = catu_sync_etr_buf,
@ -582,4 +582,22 @@ static struct amba_driver catu_driver = {
.id_table = catu_ids,
};
builtin_amba_driver(catu_driver);
static int __init catu_init(void)
{
int ret;
ret = amba_driver_register(&catu_driver);
if (ret)
pr_info("Error registering catu driver\n");
tmc_etr_set_catu_ops(&etr_catu_buf_ops);
return ret;
}
static void __exit catu_exit(void)
{
tmc_etr_remove_catu_ops();
amba_driver_unregister(&catu_driver);
}
module_init(catu_init);
module_exit(catu_exit);

2
drivers/hwtracing/coresight/coresight-catu.h
View File

@ -108,6 +108,4 @@ static inline bool coresight_is_catu_device(struct coresight_device *csdev)
return true;
}
extern const struct etr_buf_operations etr_catu_buf_ops;
#endif

15
drivers/hwtracing/coresight/coresight-tmc-etr.c
View File

@ -794,10 +794,21 @@ static inline void tmc_etr_disable_catu(struct tmc_drvdata *drvdata)
static const struct etr_buf_operations *etr_buf_ops[] = {
[ETR_MODE_FLAT] = &etr_flat_buf_ops,
[ETR_MODE_ETR_SG] = &etr_sg_buf_ops,
[ETR_MODE_CATU] = IS_ENABLED(CONFIG_CORESIGHT_CATU)
? &etr_catu_buf_ops : NULL,
[ETR_MODE_CATU] = NULL,
};
void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu)
{
etr_buf_ops[ETR_MODE_CATU] = catu;
}
EXPORT_SYMBOL_GPL(tmc_etr_set_catu_ops);
void tmc_etr_remove_catu_ops(void)
{
etr_buf_ops[ETR_MODE_CATU] = NULL;
}
EXPORT_SYMBOL_GPL(tmc_etr_remove_catu_ops);
static inline int tmc_etr_mode_alloc_buf(int mode,
struct tmc_drvdata *drvdata,
struct etr_buf *etr_buf, int node,

3
drivers/hwtracing/coresight/coresight-tmc.h
View File

@ -326,4 +326,7 @@ tmc_sg_table_buf_size(struct tmc_sg_table *sg_table)
struct coresight_device *tmc_etr_get_catu_device(struct tmc_drvdata *drvdata);
void tmc_etr_set_catu_ops(const struct etr_buf_operations *catu);
void tmc_etr_remove_catu_ops(void);
#endif